| Sulfuric acid 
            and solid sodium carbonate. | 2H+(aq) 
            + Na2CO3(s) => 2Na+(aq) + H2O(l) 
            + CO2(g) | 
         
          | Nitric acid and magnesium 
            metal | 2H+(aq) 
            + Mg(s) => Mg2+(aq) + H2(g) | 
         
          | Hydrochloric acid and 
            magnesium sulfide | 2H+(aq)+ 
            MgS (s) => Mg2+(aq) + H2S(g) | 
         
          | Sulfuric acid and magnesium 
            oxide powder. | 2H+(aq) 
            + MgO(s) => Mg2+(aq) + H2O(l) | 
         
          | Nitric acid and aqueous 
            calcium hydroxide. | H+(aq)  
            + OH-(aq) => H2O(l) | 
         
          | Hydrochloric acid and 
            aqueous sodium sulfite. | 2H+(aq) + 
            SO-23(aq) => H2O(l) + 
            SO2(g) | 
         
          | Sulfuric acid and solid 
            calcium carbonate | 2H+(aq)  
            + SO-24(aq)+ CaCO3(s) => CaSO4(S) 
            + H2O(l) + CO2(g) | 
         
          | Nitric acid and aqueous 
            sodium carbonate. | 2H+(aq) 
            + CO3-2(aq) => 2H2O(l) 
            + CO2(g) |